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10 Reasons Why Food Tracking Apps are Wrecking your Results

Food or macro tracking mobile apps or websites have been a savior for many dieters, as it promotes a level of self awareness for the actual calorie balance that your diet and lifestyle habits are creating.

However, there are features and aspects of the app that can be working against you in your battle to lose weight. By reading this article you will be able to fine tune your macro tracking abilities and possibly avoid the pitfalls of food tracking apps.

1. You are using the calorie goals provided by the app

When you create your profile, you are asked for your age, height, weight, gender, and normal daily activity level. Using those factors, the site determine the calories required to reach whatever goal you input.

While the equation (Mifflin St. Joer) used is a well backed estimation, it is in fact that, an estimation that can be drastically difference based on your metabolism, body and activity levels.

What to do: Monitor your calorie intake and weight changes over a week or 2 period to can get a more exact idea of the calorie intake you need to lose, maintain, or gain weight.

2. You are using the macronutrient ratios provided by the app

The main food tracking apps current default goals distribute calories as follows: 50% from carbohydrates, 20% from protein and 30% from fat. This set up is unlikely optimal for muscle growth or fat loss. Forgetting about the ratio of carbohydrates or fats (that’s a post in it’s self), increasing the percentage or proportion of protein in the diet has been shown to improve weight loss and muscle growth.

What to do: Aim for a higher protein intake (~30% or 1 gram/lb BW) and fill in the rest with preference of fat or carbs.

3. You are not measuring foods correctly

Weight and volume of foods are two different things. Often, the weight of a specific measurement is not repeatable and can be off by a large difference. For instance, ½ cup dry oats are listed at 40 grams weight. However, if you measure it out in a standard cup, you can easily get values of of 45, 50, or 60 grams, which can make a difference of 50-100 calories.

What to do: To ensure accuracy, weigh your food out in grams and not measure using cups and spoons. 

4. Errors in the database

There are many entries with incomplete (e.g. the entry only has calories and no macros) or incorrect information. While alot are accurate, many of the entries are done by normal people with little or no nutritional knowledge. This allows for a large amount of human error.

What to do: Make sure you use the verified entries on the database with the food labels of your favorite brands.

5. Differences in calculation of the available energy of foods

Manufacturers tend to use the general “at water factors” for calculating calories. This equals 4 calories for 1g of carb, 4 calories for 1 g of protein and 9 calories for 1 g of fat.

While this is correct for the most part, there are other methods that use specific factors for different food groups. For instance, when calculating “Cocoa” the specific atwater factors (calories) are 1.83, 1.33 8.37 per gram.

If you look at the USDA nutrient database entry (which the most popular app uses as it’s generic entry) for “cocoa, dry powder, unsweetened” it shows 19.60, 13.70, 57.90 as the protein/fat/carb breakdown for 100 grams. The calculated amount of calories using the specific 4,9,4 factors would be 433 calories, but would only be 250 calories using the specific Atwater factors.

This is nearly a 200 calorie difference per 100g.

What to do: There is not much you can do to change this but you should be aware that even “accurate” calculations can be wrong. Eating more whole foods than processed foods will ensure accuracy.


6. Rounding errors in the App

Each food entry is rounded to the nearest gram, then all of those entries are added up. Each adds a little bit of error, and this can add up over days and months.

What to do: Although there is not much you can do to change this and it probably won’t be a confounding factor it is something to be aware of.

7. Rounding errors on the nutrition label.

Nutrition labels are rounded to the nearest 5 calories (less than or equal to 50 calories per serving) or 10 calories (>50 calories per serving).

What to do: As above, this may not make a drastic difference but it’s something to be aware of.

8. Fiber Calculations

Nutrition labeling laws in the United States allow for insoluble fiber to be deducted from total carbohydrates when calculate total calories, but that fiber will still show in the total carbohydrates. E.g. if an item had 15 grams of fiber, with 5 of that being insoluble fiber, only 10 grams (40 calories) would count towards the total calories for the nutrition label.

Note that this is optional, and a manufacturer can still use the full 15 grams of carbohydrates (60 calories) for the calorie total – although most won’t to make it appear lower calorie.

20 calories less multiplied by 3 meals per day is 60 calories. Over a month this is around 1800 calories. Doesn’t sound like much, but, combined with other errors they all start to add up.

What to do: If focusing on weight loss count all of your fiber towards your carbohydrate and calorie intake. It is better to over-estimate than under-estimate.

9. Alcohol

Alcohol has 7 calories per gram, but it is not counted on the most popular food tracking apps

What to do: Moderate alcohol intake and count it as a gram of fat to be safe.

10.You are letting food or macro tracking apps ruin your life

If you are worried about accounting for every single morsel of food that you eat, the exact amount of calories you are burning during an exercise session, or worrying about the being perfect with every aspect of your lifestyle, you may be doing more harm than good. This approach is not sustainable, and can lead to negative consequences in the future.

What to do: Relax a little, and let the focus on the underlying principles of fat loss and not the minutia.

About the author


Rudy Mawer, MSc, CISSN

Rudy has a 1st class BSc in Exercise, Nutrition & Health and a Masters in Exercise & Nutrition Science from the University of Tampa. Rudy currently works as a Human Performance Researcher, Sports Nutritionist and Physique Coach. Over 7 years he has helped over 500 people around the world achieve long last physique transformations.

He now works closely with a variety of professional athletes and teams, including the NBA, USA Athletics, World Triathlon Gold Medalists, Hollywood Celebrities and IFBB Pro Bodybuilders. If you would like to get in contact or work with Rudy please contact him on social media.

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